Pecking tool



Nov. 16, 1954 w. E. LUND 2,694,435

PECKING TOOL Filed Aug. 31, 1951 W/W/a/n E. L and IN VEN TOR.

Unite 1 2,694,435 Promo TOOL William E. Lund, Spokane, Wash, assignor to William A. Stevenson, Spokane, Wash.

My present invention relates to improvements in automobile body straightening devices and more particularly to a pecking tool adapted to work sheet metal.

Various types of rollers and hammers are used in automobile body and fender straightening work. These tools are very effective in straightening many dents which are easily accessible but many dents are on portions of the automobile body or fender which are hard to get at without removing parts of the vehicle; such locations as doors, trunk cover and obstructed parts of the body.

My invention is particularly adapted to be used in restricted quarters where it is difficult to find room for operating the usual tools.

The principal object of my invention. lies in the provision of a pecking tool which is adapted to be used for body and fender work and in restricted places.

Another object of the invention lies in the provision of a pecking tool which has a reciprocable hammer for striking the anvil of a pivoted lever which carries a metal shaping tool which we shall term a peen, movable transversely of the body for striking the metal at right angles to the axial alignment of the body.

Another object of the invention lies in the provision of a pecking tool having a cylindrical body and a removable head which pivotally carries a lever removably secured therein and a metal shaping peen on the free end of the lever.

Another object of the invention lies in the provision of a pecking tool having a reciprocable hammer adapted to be shifted forwardly under influence of fluid pressure and returned rearwardly by means of a spring; said hammer being provided with an escape port to permit escape of pressure and allow the spring to return the hammer.

Another object of the invention lies in the provision of a pecking tool comprising a minimum number of parts which may be assembled with facility at a low cost and which is not liable to get out of working order.

I do not propose to claim my invention broadly as an air-operated tool for any and all uses, but rather I desire to secure my invention as a pecking tool for working sheet metal.

These and other objects of the invention will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts,

Figure l is a side elevation of my improved pecking tool with portions broken away for convenience of illustration,

Figure 2 is a perspective view of the head forming a part of my invention and looking from the rear,

Figure 3 is a second perspective view of the head looking from the front,

Figure 4 is a vertical cross section, upon an enlarged scale, of the reciprocable hammer, and,

Figures 5, 6, 7 and 8 are side elevation of the pivoted levers, each having a modified peen for shaping metal.

Referring now more particularly to the drawings, I have indicated the pecking tool in general by the numeral 10 and it has a cylindrical body 11 closed at its rear end by means of a plug 12 having a reduced forward end 13 defining an annular shoulder 14 which is adapted to abut the rear end of cylindrical body 11. The plug 12 is provided with a centric bore 15, threaded to receive a pipe nipple 16 for communicating a thumb operated valve 17 with the bore of plug 12. An air line 18 connects the valve 17 with a source of fluid under pressure such as compressed air.

Plug 12 is secured in the rear end of body 11 by means of a bolt 19 which passes through a bore 20 in the side walls of the body and diametrically disposed and aligned with the bore 20 in plug 12.

The external face of the body 11 is counter sunk about one opening or mouth of the bore 20 to receive the States Patent O tapered head of the bolt 19, and the bore 20, in the opposed wall from the counter sunk opening, is threaded to receive the threaded end of the bolt and secure the bolt therein. The bolt is finished flush with the peripheral face of the body so no protrusion is presented.

Within the body 11, a hammer 21 is disposed and adapted for reciprocation therein. The hammer is provided with a relatively heavy body 22 which is round in cross section and has a bevelled leading edge 23. A

longitudinally extending restricted opening 24 forms an exhaust port to permit the escape of air entrapped behind the hammer and thus allows spring 25 to return the hammer 21 rearwardly after the valve is closed eliminating introduction of fluid pressure.

Spring 25 is secured to hammer 21 by means of an eye 26 threaded into a drilled and tapped socket 27 centric of the rear face 28 of the hammer 21. The opposed end of spring 25 is secured to the bolt 19 at a point where it passes through the bore 15.

The forward end of the body 11 carries a head 29 having an annular ring 30 adapted to enter the body 11 at its forward end. Ring 30 has a slot 31 formed therein at the bottom and disposed at right angles to the diametrically opposed bores 32 and which is provided to make clearance for the anvil of the pivotal lever or intermediate member 34. Forwardly of the slot 31, the head is formed with an upwardly and forwardly extending inclined face 33 forming a stop for the member 34 and which terminates in a longitudinally extending groove 35. The balance of the head is a metallic mass of semi-circular shape and has an upper flat face 36, a bevelled semi-circular edge 37 and a flat end face 38. A semi-circular shoulder 39 is provided to abut the forward end (13f body 11 and limit the movement of ring 30 into the ody.

A bolt 40 passes diametrically through the body adjacent its front end at right angles to the bolt 19 and is threaded into the side wall of the body as is bolt 19. The bolt 40 secures the head in body 11 by passing through bores 32 of ring 30. Lever 34 has an aperture 41 which receives bolt 40 thus journaling the lever thereon for pivotal movement.

The member 34 is provided with an angularly disposed anvil 42 adapted to be struck by hammer 21 which causes the member to pivot over journal bolt 40 lifting the opposed free end of the member 34 which carries a peen 43 for working or pecking metal. The peen shown is a round headed boss, but as indicated in Figures 5, 6, 7 and 8 the peen may be one of any number of shapes found adapted to the job at hand. Figure 5 shows a peen having an arcuate elongated barb, Figure 6 reveals a peen having an angled bit, Figure 7 has a straight point and Figure 8 as short blunt peen.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

A pecking tool comprising an elongated cylindrical body, a plug in one end of the body and having a central bore adapted to be connected to a valved fluid pressure supply, a bolt extending diametrically through said body and plug for securing the plug in said body, a reciprocable hammer within the body and having a resilient means secured at one end to the hammer and the other end to said bolt, a restricted port extending longitudinally through said hammer, a head in the opposed end of said body, a journal pin extending through said body and head, a lever journaled on said pin and having an anvil thereon disposed to be struck by said hammer when shifted forwardly, whereby the lever is pivoted to raise the free end thereof, and a metal working peen on the free end of the lever for pecking dents from metal.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 410,935 Schmidt Sept. 10, 1889 2,526,380 Mathews Oct. 17, 1950 2,534,525 Molloy Dec. 19, 1950 FOREIGN PATENTS Number Country Date 581,665 Great Britain Oct. 21, 1946 

